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Cheap flights from Rennes to Southampton from £299

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — SOU
31 Aug — 7 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Rennes to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Rennes to Southampton
Explore the most affordable flight options available from Rennes to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 August 2026.

Mon 31/814:25
RNS
-
SOU
1 stop19h 10m
KLM
Mon 7/917:20
SOU
-
RNS
1 stop19h 35m
KLM
Deal found 1/8£299
Tue 11/818:05
RNS
-
SOU
1 stop15h 40m
KLM
Wed 12/818:05
SOU
-
RNS
1 stop22h 30m
KLM
Deal found 29/7£384
Tue 11/822:00
RNS
-
SOU
2 stops19h 50m
Multiple Airlines
Wed 12/820:00
SOU
-
RNS
2 stops22h 25m
Multiple Airlines
Deal found 29/7£389
Sat 15/812:40
RNS
-
SOU
2 stops20h 15m
Multiple Airlines
Wed 19/818:05
SOU
-
RNS
1 stop22h 30m
Multiple Airlines
Deal found 30/7£396
Sat 8/812:40
RNS
-
SOU
2 stops20h 15m
Multiple Airlines
Tue 11/814:25
SOU
-
RNS
2 stops18h 35m
Multiple Airlines
Deal found 29/7£433

Find flight deals from Rennes to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Rennes (RNS) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 August 2026.

Round-trip from

£299

Popular in

August

Cheapest in

January

Average price

£163
KLM
  • KLM
  • 31/8-7/9
  • 2 total stops
  • 38h 45m total
  • Rennes to Southampton
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Rennes to Southampton that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 August 2026.
Use the filters below to find and compare flights from Rennes to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

RennesSouthampton

RNS - SOU

RNSSOU

Rennes St Jacques

Mon 31/8

14:25-08:35

1 stop19h 10m

Southampton Eastleigh

Mon 7/9

17:20-13:55

1 stop19h 35m

£299

RennesSouthampton

RNS - SOU

RNSSOU

Rennes St Jacques

Tue 11/8

22:00-16:50

2 stops19h 50m

Southampton Eastleigh

Wed 12/8

20:00-19:25

2 stops22h 25m

£389

RennesSouthampton

RNS - SOU

RNSSOU

Rennes St Jacques

Sat 15/8

12:40-07:55

2 stops20h 15m

Southampton Eastleigh

Wed 19/8

18:05-17:35

1 stop22h 30m

£396

RennesSouthampton

RNS - SOU

RNSSOU

Rennes St Jacques

Tue 11/8

18:05-08:45

1 stop15h 40m

Southampton Eastleigh

Wed 12/8

18:05-10:20

2 stops39h 15m

£447

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Sorted by cheapest first

Best time to book a flight from Rennes to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Rennes with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Rennes to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Rennes to Southampton?

    For as low as £299, KLM can have you in Southampton from Rennes in 19h 10m. Rennes and Southampton are separated by a distance of 200 mi.

  • Can I find deals for flights from Rennes to Southampton that include hotel bookings?

    Yes. In addition to deals on Rennes to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Rennes to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rennes to Southampton.

  • Can I find deals for business class flights from Rennes to Southampton?

    Yes. Cheapflights offers flight deals from Rennes to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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How does Cheapflights help users find flights from Rennes to Southampton?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Rennes to Southampton. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Rennes to Southampton?

Cheapflights helps you find that perfect flight to Southampton from Rennes by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Rennes to Southampton with no change fees?

Certainly. Search results for flights to Southampton from Rennes shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Rennes to Southampton become cheaper?

Yes! Start tracking prices for Rennes to Southampton flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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